diff --git a/fsrc-core/Cargo.toml b/fsrc-core/Cargo.toml
index 9cc1e70..b93b956 100644
--- a/fsrc-core/Cargo.toml
+++ b/fsrc-core/Cargo.toml
@@ -24,5 +24,5 @@ zerocopy = "0.6.1"
 once_cell = "1.13.1"
 
 [features]
-default = ["use_std"]
-use_std = ["downcast-rs/std"]
+default = ["std"]
+std = ["downcast-rs/std"]
diff --git a/fsrc-core/src/pool_test.rs b/fsrc-core/tests/pool_test.rs
similarity index 100%
rename from fsrc-core/src/pool_test.rs
rename to fsrc-core/tests/pool_test.rs